.login{
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: url('https://cas.1000phone.net/cas/images/login/bg.png') no-repeat center;
  .login-box{
    width:400px;
    background-color: #fff;
    border-radius: 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 46px 0;
  }
  .login-btn{
    width: 100%;
  }
}